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Abstract：
The present work is aimed at studying the effects of the magnetorheological finishing process, using a low-frequency alternating magnetic field, on the finishing performance of 6063 aluminum alloy. The study investigates the influence of key excitation parameters such as current, frequency, excitation gap, and iron powder diameter on the material removal and surface roughness (Ra) of the finished workpiece by experiments. This study employs a single-factor experimental method, and the finish surface is analyzed by a Zigo non-contact white light interferometer. The magnetic field strength in the processing area increases with the increase in the excitation current and decreases with the increase in the excitation gap. When the current frequency is set to 1 Hz, the circulation and renewal of abrasives in the magnetic cluster is most sufficient, resulting in the optimal surface roughness value for the workpiece. According to the experimental results of the excitation parameters, more suitable process parameters were selected for a two-stage finishing experiment. The surface roughness of 6063 aluminum alloy was improved from 285 nm to 3.54 nm. Experimental results highlighted that the magnetorheological finishing using a low-frequency alternating magnetic field is a potential technique for obtaining nano-scale finishing of the 6063 aluminum alloy.
摘要：
本工作旨在研究磁流变精加工工艺的影响，利用低频交变磁场，6063铝合金的精加工性能。该研究调查了关键励磁参数的影响，如电流，频率,激励间隙,和铁粉直径对成品工件的材料去除和表面粗糙度(Ra)的影响。本研究采用单因素实验方法，并通过Zigo非接触白光干涉仪对光洁度表面进行分析。加工区域的磁场强度随励磁电流的增大而增大，随励磁间隙的增大而减小。当当前频率设置为1Hz时，磨料在磁簇中的循环和更新是最充分的，导致工件的最佳表面粗糙度值。根据激励参数的实验结果,选择更合适的工艺参数进行两阶段整理实验。6063铝合金的表面粗糙度由285nm提高到3.54nm。实验结果表明，使用低频交变磁场的磁流变精加工是获得6063铝合金纳米级精加工的潜在技术。
